Avian Speciation in the Pantepui: The Case of the Roraiman Antbird (Percnostola [Schistocichla] “Leucostigma” Saturata)

Braun, Michael J.; Isler, Morton L.; Isler, Phyllis R.; Bates, John M.; Robbins, Mark B.

doi:10.1650/7647

Cited by 17 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A similar case of sympatric/parapatric speciation occurred in antbirds (Thamnophilidae, Percnostola) of northern South America (Braun et al 2005). The roraiman antbird Percostola saturata , endemic to tepuis of southeastern Venezuela and northern Brazil, is elevationally parapatric to its more widespread lowland sister, the spotted‐winged antbird Percnostola leucostigma .…”

Section: Discussionmentioning

confidence: 74%

Patterns and timing of diversification in a tropical montane butterfly genus, Lymanopoda (Nymphalidae, Satyrinae)

Casner¹,

Pyrcz²

2010

Ecography

View full text Add to dashboard Cite

Species distributions are a product of contemporary and historical forces. Using phylogenetic and geographic data, we explore the timing of and barriers to the diversification of the Andean butterfly genus Lymanopoda (Nymphalidae, Satyrinae). Clade and species level diversification is coincident with Andean orogeny and Pleistocene glaciation cycles. Lymanopoda has primarily diversified within elevational bands, radiating horizontally throughout the Andes with occasional speciation across elevational boundaries, often associated with ecotones. Narrow elevational ranges and infrequent speciation into adjacent elevational strata suggest that expansion across elevational gradients is relatively difficult. These results are similar to those found in studies of other Andean taxa.

show abstract

Section: Discussionmentioning

confidence: 74%

Patterns and timing of diversification in a tropical montane butterfly genus, Lymanopoda (Nymphalidae, Satyrinae)

Casner¹,

Pyrcz²

2010

Ecography

View full text Add to dashboard Cite

show abstract

“…Those cases in which molecular and phenotypic data have been used to revise species limits in previously polytypic tropical species, intraspecific distances have dropped to temperate zone values. For example, when Schistocichla ( Percnostola) leucostigma was divided into S. leucostigma and S. saturata, intraspecific distance was reduced from 9% to less than 1% (ATPase 6+ND2+ND3, Braun et al [57]), and the taxonomic split of Capito niger into four species reduced mean intraspecific divergence from 6% to again less than 1% (cyt b + COI, Armenta et al [58]). …”

Section: Discussionmentioning

confidence: 99%

A Trans-Amazonian Screening of mtDNA Reveals Deep Intraspecific Divergence in Forest Birds and Suggests a Vast Underestimation of Species Diversity

et al. 2012

View full text Add to dashboard Cite

The Amazonian avifauna remains severely understudied relative to that of the temperate zone, and its species richness is thought to be underestimated by current taxonomy. Recent molecular systematic studies using mtDNA sequence reveal that traditionally accepted species-level taxa often conceal genetically divergent subspecific lineages found to represent new species upon close taxonomic scrutiny, suggesting that intraspecific mtDNA variation could be useful in species discovery. Surveys of mtDNA variation in Holarctic species have revealed patterns of variation that are largely congruent with species boundaries. However, little information exists on intraspecific divergence in most Amazonian species. Here we screen intraspecific mtDNA genetic variation in 41 Amazonian forest understory species belonging to 36 genera and 17 families in 6 orders, using 758 individual samples from Ecuador and French Guiana. For 13 of these species, we also analyzed trans-Andean populations from the Ecuadorian Chocó. A consistent pattern of deep intraspecific divergence among trans-Amazonian haplogroups was found for 33 of the 41 taxa, and genetic differentiation and genetic diversity among them was highly variable, suggesting a complex range of evolutionary histories. Mean sequence divergence within families was the same as that found in North American birds (13%), yet mean intraspecific divergence in Neotropical species was an order of magnitude larger (2.13% vs. 0.23%), with mean distance between intraspecific lineages reaching 3.56%. We found no clear relationship between genetic distances and differentiation in plumage color. Our results identify numerous genetically and phenotypically divergent lineages which may result in new species-level designations upon closer taxonomic scrutiny and thorough sampling, although lineages in the tropical region could be older than those in the temperate zone without necessarily representing separate species. In-depth phylogeographic surveys are urgently needed to avoid underestimating tropical diversity, and the use of mtDNA markers can be instrumental in identifying and prioritizing taxa for species discovery.

show abstract

“…Although the configuration proposed here is consistent with the boundaries defined by Cracraft (1985), this author never mentioned the Rio Branco or the savannas as important barriers. West of the Rio Branco, Cracraft (1985) identified the Pantepui area of endemism, an area with a unique montane avifauna that is not closely related to that of the surrounding lowland forests (Mayr & Phelps, 1967; Braun et al. , 2005).…”

Section: Discussionmentioning

confidence: 99%

Avian distribution patterns in the Guiana Shield: implications for the delimitation of Amazonian areas of endemism

Naka¹

2010

Journal of Biogeography

View full text Add to dashboard Cite

Aim To develop a methodology for defining the boundaries of the Guianan area of endemism using complementary approaches that include GIS tools, multivariate statistics and analyses of physical barriers in the distribution patterns of an entire endemic avifauna. As a case study, I used the distribution patterns of lowland terra firme forest birds.Location Guiana Shield, northern South America.Methods I identified Guianan endemics using the ornithological literature, subsequently gathering distributional data for these taxa using mainly museum collections and my own fieldwork in the region. I used these distributional data to map the spatial patterns of endemicity in the region and to compare distributions across taxa. I employed community composition data from 34 localities from throughout the Guiana Shield to identify spatial patterns of clustering using an ordination analysis (non-metric multidimensional scaling), and to recognize the region's main biogeographical barriers for birds using Monmonier's algorithm.Results At least 88 avian taxa are restricted to the terra firme forests of the Guianan area of endemism, which is roughly delimited by the Amazon, Negro and Branco rivers. These large rivers, however, are not the only boundaries. I identified seven additional barriers, including medium-sized rivers, non-forested areas and mountains, which also contribute to delimiting the area of endemism. Within the endemic avifauna, I identified three distinct distribution patterns. The ordination analysis shows the presence of two distinct avifaunas within the Guiana Shield.Main conclusions Although the proposed boundaries of the Guianan area of endemism are consistent with previously postulated configurations, this study reveals a more complex delimitation than formerly recognized, highlighting the importance of several landscape features besides large rivers, and the existence of three distinct distributional patterns within one endemic avifauna. The Branco/ Negro interfluvium, often included within this area of endemism, actually represents a transition zone between two distinct avifaunas. The longstanding view of the Amazon Basin as a mosaic of parapatric areas of endemism delimited by major rivers appears to be an oversimplification, at least for the Guiana Shield. This finding suggests the need for more rigorous approaches to re-evaluate the traditional boundaries of such areas.

show abstract

Avian Speciation in the Pantepui: The Case of the Roraiman Antbird (Percnostola [Schistocichla] “Leucostigma” Saturata)

Cited by 17 publications

References 27 publications

Patterns and timing of diversification in a tropical montane butterfly genus, Lymanopoda (Nymphalidae, Satyrinae)

Patterns and timing of diversification in a tropical montane butterfly genus, Lymanopoda (Nymphalidae, Satyrinae)

A Trans-Amazonian Screening of mtDNA Reveals Deep Intraspecific Divergence in Forest Birds and Suggests a Vast Underestimation of Species Diversity

Avian distribution patterns in the Guiana Shield: implications for the delimitation of Amazonian areas of endemism

Contact Info

Product

Resources

About